From Odakyu Line's West exit or Keio Line's West Exit.
When you come out from the ticket barrier, you are still at the underground of the station, please take the escalator on your left-hand side and go up. You will soon see the main exit of the west side of the Shinjyuku station.

When you walk out from the West Exit, please keep walking to the left.

Walk alone with the Keio Department Store, you will see a crosswalk on your right side.
(On the other side, you will see YODOBASHI's mobile shop at the corner and many coin lockers)

Cross the crosswalk and turn left then go straight, you will see a Red signboard of "Tokyo Mitsubishi UFJ Bank",(三菱東京UFJ銀行) turn right at that corner.
From JR's South exit

When you come out from JR's south exit, please turn right.

You will see a big crosswalk, cross it and turn right.

Keep going you will see a red signboard of "Tokyo Mitsubishi UFJ Bank" (三菱東京UFJ銀行), then turn left on the corner.